Tire having improved resistance to thermal degradation

Abstract

A paint having high thermal conductivity to be applied to the outer surface of a tire. The paint consists of a rubber compound having a thermal conductivity greater than or equal to 0.2 Wm −1 K −1 , a viscosity of between 0.5 and 10000 cP and an elasticity modulus less than or equal to 8 MPa.

1 . A paint having high thermal conductivity to be applied to the outer surface of a tire, said paint being characterized in that it consists of a rubber compound having a thermal conductivity greater than or equal to 0.2 Wm −1 K −1 , a viscosity of between 0.5 and 10000 cP and an elasticity modulus less than or equal to 8 MPa. 
     
     
         2 . The paint according to  claim 1 , characterized in that said rubber compound comprises a cross-linkable unsaturated chain polymer. 
     
     
         3 . The paint according to  claim 1 , characterized in that said rubber compound is water-based. 
     
     
         4 . The paint according to  claim 3 , characterized in that said water-based compound comprises a filler and an adhesive resin. 
     
     
         5 . The paint according to  claim 4 , characterized in that said filler is carbon black. 
     
     
         6 . The paint according to  claim 5 , characterized in that the carbon black is present in an amount of between 5 and 80 phr. 
     
     
         7 . A tire comprising a layer having high thermal conductivity, said tire being characterized in that said layer having high thermal conductivity is made of a paint according to  claim 1 , applied to at least part of the outer surface of the tire itself. 
     
     
         8 . The tire according to  claim 7 , characterized in that said paint is applied to the grooves of the tread portion and to the sidewalls of the tire. 
     
     
         9 . The tire according to  claim 7 , characterized in that the layer having high thermal conductivity has a thickness of between 10 and 100 μm.